Saw gummeb



(No Model.) 4 Sheets-Sheet 1.

C. A. CHANDLER. SAW GUMMER. No. 540,145. Patented May 28, 1895.

It: 5 68 Q 11 I mu 6 [TEE e 'll llllli of g (No Model.)

' 4 Sheets-Sheet 2. O. A. CHANDLER. SAW GUMMER.

No. 540,145. Patented May 28, 1895.

Q 0 4. 5 1 Q 71 01 f P 0 Z W 44 ad- \XATNEEIEIES. w; Jm-MM (No Model.) 4 Sheets-Sheet a.

r G. A. CHANDLER.

SAW'GUMMER.

Patented May 28, 1895.

(No Model.) 4 Sheets-Sheet 4f 0. A. CHANDLER.

$AW GUMMER. No. 540,145.

PatentedMay 28, 1895.

WILFNEESES;

UNITED STATE PATENT ()FFICE.

CLARENCE A. CHANDLER, OF EAST BRIDGEWATER, MASSACHUSETTS.

SAW-GUMMER.

SPECIFICATION forming part of Letters Patent No. 540,145, dated May 28, 1895.

Application filed May 21, 1894.

To all whom it may concern:

Be it known that I, CLARENCE A. CHAN- DLER, of East Bridgewater, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Saw-Gummers, of which the following is a specification.

This invention relates to machines for filing cotton-gin saws, and is directed toward providm'g'fimproved means for gun 1 ming out the teeth, which means may constitute a machine in themselves, or may be used as an attachment to a machine for pointing the teeth of saws, which attachment is designed to remove or gum out the material between the teeth while the pointing files are at work.

A construction embodying the invention is illustrated in the accompanying drawings, in whioh- Figure 1 shows a plan view of a cotton-gin saw-filing machine with the improved gummer applied thereto. Fig. 2 shows a side elevation of the same. Fig. 3 shows, on an enlarged scale, a side elevation of the gummer. Fig. 4 shows atop plan view of the gummer. Fig. 5 shows a front end elevation of the same with some parts in section. Fig. 6 shows, partly in side elevation and partly in section, the front portion of the gumming appliance. Fig. 7 shows a top plan view of the central portion of a certain pulley with a cross-section of a spindle which passes therethrough. Fig. 8 shows an elevation, on an enlarged scale, of part of a certain extensible pitman. Fig. 9 shows a fragmentary view of a saw which has been pointed but not gummed. Fig. 10 showsa fragmentary view of apointed and gummed saw, together with a partial elevation and partial section of the gumming disk and support. Fig. 11 shows a section on line 11 11 of Fig. 10. Fig. 12 shows a perspective view of the complete machine.

The gummer here shown, when employed as an attachment to a machine for pointing the teeth of. the saws, is designed to be mounted upon the carriage of the machine, so as to be carried along with the pointing files and doits work at the same time.

The letter, 2', designates the frame of the filing machine, to which are fastened brackets, z, forming bearings for a cylinder made up of a gang of disks, 0, to be filed, and. in-

Serial No. 511,905. (No model.)

the carriage a at one side of the files b and their actuating devices, and said gumming attachment comprises a base frame or fixture d, to rest on the carriage and be securely bolted thereto; atubular holder or bearing a pivotally supported near its upper end between upright arms d of the base frame; a horizontal pulleyf having a tubular hub f journaled in the upper end of the tubular holder 6 and prevented from moving longitudinally therein by a screw f 2 which is entered through the holder and engages an annular groove in the hub; a spindle g extending through the said tubular pulley-hub and through a hearing at the lower end of the holder c, said spindle being rotatively connected with the pulley by the engagement of feathers g on the spindle with grooves in the pulley-hub, permitting the spindle to slide longitudinally; a disk h on the lower end of the spindle g and havihg its marginal portion formed as a file and beveled on the under side, giving it a frusto-oonical appearance. Best illustrated on Fig. 10. This disk is fitted over a reduced portion of the spindle with which it is rotatively connected by the engagement of a pin h fastened in the spindle with a groove in the disk. A nut h fitting on a further reduced and screw-threaded end of the spindle confines the disk thereon, but provision is made -for slight play of the disk by having the said nut abut a shoulder at the base of the screw-thread and allowing sufficient space between said shoulder and that at the base of the reduced part of the spindle which receives the disk. The disk fits loosely on the spin dle, so as to permit its tilting slightly in any direction. This arrangement permits the disk to be sufificiently displaced, should it strike the point of a tooth, to move 0d the point without damage to the same. Provision is made for the disk following into the throats between the teeth while the saws corn tinue to revolve, by arranging its supporting spindle to slide in the hub of the pulley, as previously explained. Aspiral spring 72, may

be inserted between the upper end of the tubular holder and a collar on the upper end of the spindle, to balance the weight of the disk and spindle,-so as to prevent unnecessary filing away of the lower side of the throat.

An idle pulley t'is supported by an adjust able bracket c" on base d, and another idle pulley i is supported on a stud i fastened in an upright arm at the rear endof the base frame. A belt j passes around the pulleyf, and one stretch of said belt is c'arried-overtshe idler 2, and the other over the idler i and said belt receives motion from a pulley j mounted on .a convenientshatt, as 9' of the machine.

In the operation of the machine, :thedi-sk h 1 is continuously rotated, through the :connections described. Its feed motion is imparted through connections presently set forth.

The pivotal holder 6 has ;a rearwardly extending arm e which is connected with a' crank-disk m loose on the stud i at-the rear of the base frame, by a pitman composed of two members a and at, each of which carries a collar n through which the other passes The pivot-pin p which connects the arm e and the pitman member n" is extended at one side for engagement with a stop which determines the extent of the forward or feeding movement of the gumming-d-isk. This step is of the following construction and arrangement: An arm (1 is pivoted at one end -;to an ear on one of the uprights d, and is formed at the opposite end with a boss internally screw-threaded to receive a set-screw q whose end bears against the said upright 01. aS'aid arm is formed on the inner side with a lug g of substantially triangular form, against one side of which the pin 1) abuts to limit the forward movement of the filing disk. It will be seen that by turning the set-screw q the extent of such movement can be made-greater or less, as required by the work in hand. The triangular lug also provides means for taking the filling dis-k out .of operative position and holding it so. This is accomplished by throwing the arm q back on its pivot to the position shown in Fig. .6, causing the pin 19 to ride up the rear side of the lug and onto the upper side thereof. By this action, the filing disk is withdrawn from an operative position, and no motion is imparted to it by the crankd-is-k, whose for-ward throw is taken up by the spring 0. The lug g is extended upward, as

at (1 to form an abutment for the pin when the arm is thrown back. The crank-disk m is formed with sprocket-teeth for engagement of a sprocket-chain o which connects it with the shaft 7' and through these connections said disk is revolved.

The'operation of the machine may be briefly stated as follows: The cylinder composed of the saws and separating washers revolves slowly while the files I) point the teeth by a reciprocating and partial rotary movement, as is well understood in the art. At the same time, the gumming disk h continuously rotates at high speed, and is successively advanced into the throats between the teeth, said disk rising as it advances, so as to compensate for the rotary motion of the saw,and then dropping back over the teeth to position for entrance into the next throat.

The gummer is adapted for use independout of the pointing machine, and the invention is not limited to its conjoint use therewith.

Fig. :9 illustrates the appearance of a saw, as pointed but not gummed, the letter 3 designating the teeth and s the material left between them.

In Fig. 10, the appearance of a saw which has been'treated by the gummeris illustrated.

Having thus described a wayof embodying my invention, what I claim as new is- 1. In a saw-gummer, the combination of a base-frame, a movable holder thereon, a spindle journaled in said holder, a filing disk mounted on said spindle so as to rotate therewith and being free to play longitudinally thereon to a limited extent, means for rotating the spindle, and means for advancing and retracting the holder.

2. In a saw-gummer, the combination of a base frame, a movable holder thereon, a pulley journaled in said holder, a spindle longitudinally movable through the pulley and rotatively engaged therewith, a filingJisk mountedon sa-idspindle so as to rotate therewith :and being free to tilt thereon to a limited extent, and means for advancing and retracting the holder.

3. In a .saw-gum-mor, the combination of a base frame, a holder movably supported by said f rame,a filingdisk carried by said holder, means for transmitting rotary motion to the said disk, a crank, an extensible spring-distended pitman connecting the same with the movable holder, and a stop against which a projection or shoulder on the pitman abuts, for the purpose described.

4. In a saw-glimmer, the combination of a base frame, a holder movably supported by said frame, a filingdisk carried by said holder, means for transmitting rotary motion to the said disk, a crank, an extensible spring-distended pitman connecting the same with the movable holder, and a pivotal arm having a lug against which a projection on the pitman abuts, and which is formed to take the filing disk to an operative position, under movement of said pivotal arm, and constitute a rest for holding it in such inoperative position.

5. In a saw-gummer, the combination of a base frame, a holder movably supported by said frame, a filing disk carried by said holder, means for transmitting rotary motion to the said disk, a crank, a pitman connecting the same with the movable holder and consisting of two rigid members, each having affixed to it a collar through which the other member loosely extends, and a spiral spring on one member between a collar thereon and the collar on the other member, and a stop against which a projection on the pitman abuts, substantially as and for the purpose described.

6. A saw gummer comprising a base support, a pivotal holder thereon, a filing disk carried by said holder, means for rotating CLARENCE A. CHANDLER.

Witnesses:

HERBERT H. CHASE, EDWARD SHATTUOK. 

